pyrocluster cinema 4d 9 Manual Do Utilizador
24 REFERENCE
PYROCLUSTER
Volume
When using high World Step Size values, keep Volume at its default value of
100%
The Volume value controls how
accurately a ray is sub-sampled
within the PyroCluster volume.
Volume controls how accurately a ray is sub-sampled in the PyroCluster volume; it
determines how far a ray penetrates into the volume and thus how many points are
sampled. A Volume of 50% would consider only half of the points in a volume when
creating the fractal noise. Lower values for Volume result in a faster calculation but
give an uglier, more blocky look to the smoke or cloud effect. Volume is one of the
most critical parameters in PyroCluster; it has a great impact on the look of the effect
and the render speed.
sampled. A Volume of 50% would consider only half of the points in a volume when
creating the fractal noise. Lower values for Volume result in a faster calculation but
give an uglier, more blocky look to the smoke or cloud effect. Volume is one of the
most critical parameters in PyroCluster; it has a great impact on the look of the effect
and the render speed.
Luminosity
When, and how strongly, this additive calculation should occur is set using
the Luminosity gradients on the other pages of the PyroCluster settings.
the Luminosity gradients on the other pages of the PyroCluster settings.
Particles with Luminosity set to
0% (left) and 100% (right).
Usually PyroCluster uses a weighted calculation algorithm to add the atmospheric
effects to the scene. The particular calculation used means that, in general, dense
clouds are rendered darker and more opaque than think clouds.
effects to the scene. The particular calculation used means that, in general, dense
clouds are rendered darker and more opaque than think clouds.
This Luminosity setting gives you control over the amount of additive pixel calculation,
expressed as a percentage of the total effect. This is the opposite of weighted pixel
blending because, in this case, as you increase the Luminosity value more particles
in an area result in a brighter overall appearance.
blending because, in this case, as you increase the Luminosity value more particles
in an area result in a brighter overall appearance.
As you increase the value to 100%, Luminosity smoothly turns the calculation into
an additive pixel color blend; pixel intensities will be added and you will get bright
areas instead of dark ones in the cloud.
areas instead of dark ones in the cloud.